After a masseuse found 28-year-old Heath Ledger unresponsive in his apartment in New York, she used his cell phone to call his friend, actress Mary Kate Olson, instead of calling 911.

Car crashes are scary, dangerous events, and they happen all too often. There are more than 120 million cars on the road in the U.S., and only half of those are legally registered. There are more than 6 million crashes every year, which results in more than 2.5 million injuries and 40,000 deaths.

Terrorist attacks are becoming increasingly more common abroad, and they pose a major threat to Americans on U.S. soil as well.